Dispensing-pump.



G. F. PRBSSLER.

DISPENSING PUMP.

APPLICATION FILED NOV. 11, 1908.

,27 r T l WITNESSES:

Patented Mar. 2, 1909.

. g 9N 0 I] n2 Man/4V j Ill/VENTOR ATTORNEY CHARLES FRED PRESSLER, OF FORT WAYNE, INDIANA.

msrENsme-PUMP.

Specification of Letters Patent.

Patented March 2,1909.

Application filed. November 11, 1908. Serial No. 462,086. I

To all whom it may concern:

Be it known that 1, CHARLES F; PREssLER, a citizen of the United States of America, and resident of Fort Wayne, in-the county of Allen and State of Indiana, have invented certain new and useful Improvements in Dispensing-Pumps, of which the following is a specification.

This invention relates to improvements in dispensing pumps of the class designed to discharge In asured quantities of fluid, and the object of the improvement is to afford a self-measuring dispensing ump of the re ciprocatin type that will dischar e an equal amount 0 fluid at each cycle 0 itsmovementh; I

It is generally understood that in pum s having a reciprocating plunger or piston, t e discharge from the end of the cylinder, through which the piston-rod extends, is less in quantity than from the opposite end because of the displacement o fluid by the piston-rod.

The present invention will therefore contemplate com ensation forthe displacement effected by t e piston-rod of liquid in the corresponding end of the cylinder of the P mp- The object of this invention is accomplished by the construction illustrated in the accompany' g drawings, in which Figure 1. is a side e evation of the pump showingthe cylinder artly in section. Fig.

2. is an elevation of t e same in a plane at right angles to that of Fig. 1, and Fig. 3. is a detail view showing an adjustable crank for drivin the compensating plunger.

S ar numerals of reference indicate corresponding parts throughout the several views, and referring now to the same: 1 is the pump cylinder, and 2 is a piston operating therein, the piston having a piston-rod 3 that has a connecting-rod 4 for driving the same. The connecting-rod has connection with a revoluble wheel 5 by which it is actuated. A' shaft 6 affords su port for the wheel 5 and is mounted in a bracket 7 that extends above the cylinder. A crank 8 is fixed upon the end of the shaft and is disposed oppositel respecting the pin 9 on the wheel to whic tached. In the crank 8 is a sliding block 10 from which extends a pin 11, and an adjusting screw 12 in the crank extends through the black to effect adjustment thereof.

From the top of the cylinder 1 extends a the connecting-rod is at ary cylinder during the downward stroke ofv the piston, sufficient fluid as will compensate during the return of the piston for the liquid displaced by the presence of the piston-rod in the upper part of the cylinder.

At the connection of the piston-rod 3 and connecting-rod 4 is a cross-head 16 that works in ways 17 to revent strain and lost motion. This crossead has an extension 18 which is adapted to become engaged by one or the other of the stops 19 or 20 according to the adjustment of the latter and thereby regulate thelength of stroke of the piston and consequent discharge of fluid from the pum The stops are adjustably fixed upon an a justable shaft 21 operated by a handle 22 so that either one or the other of the stops may1 be brought over in line with the path of t e extension 18 as desired. Each stop has an adjusting-screw 23 b means of -.which secondary cylinder 13 in which a plunger 14 delicate variations of a justment may be made.

The cylinder has a suction pipe 24 with inlet valves 25 and 26 connectin the corresponding ends of the cylinder, an also a discharge pipe 27 with outlet valves 28 and 29- connectlng the correspondin ends of the cylinder and through which t e fluid is disc arged after having been drawn through the suction pipe.

Motion may be imparted to the wheel 5 by an suitable means, such as by a gear 30 driven by a crank 31.

Having described my invention, what I claim as new and desire to secure by Letters Patent is v 1. In a dispensing pump having a cylinder with a piston operating therein and a pistonrod extending from the piston through one head of the cylinder, a secondary cylinder having communication with the other cylinder at the end thereof in which the pistonrod extends, a plunger operating in the sec ondary cylinder, and means to actuate the piston-and plunger oppositely respecting one another. I

2. In a dispensing pump, a cylinder, axiston operating therein, a lston-rod exten in through the u per hea of the cylinder an connected wit the' iston to actuate the same, a secondary cy inder communicatin with the other cylinder at the upper-en thereof, a plunger operating in the secondary cylinder, suitable mechanism in connection with both the piston-rod and plunger adapted to actuate the same oppositely respectmg one another, and adjustable means adapted to regulate the movement of the plunger relative to that of the piston.

. 3. In apparatus of the class described, a

reciprocating pump having a piston-rod for o eratin the same, a secondar cylinder in P g Y communication with that end of the pumpcylinder, means. in connection with the piston-rod and plunger adapted to actuate the same 0 osltely and adjustable sto s adapted to lim P piston-rod and'plunger.

In testimony whereof I affix my signature, in presence of two witnesses.

CHARLES FRED PRESSLER. Witnesses: I

W. G. BURNS, R. W; BURNS.

it t e movement of said 25 

